IAM Identity Permissions Sets Allow for Multiple AWS Managed Policies

[Jakeasaurus]

Describe the feature

Allow for multiple ARNs to be selected for IAM managed policies in AWS IAM Identity Center permission set and groups.
DEVSECOPS-10

Considerations:
What is the issue we are solving with this request? Allowing multiple policies to be selected when using AWS Managed Policies.
Does it require modifying an existing module or adding a new module? Modify existing.
What will be the most scalable, repeatable way to create and add/edit/modify this feature? Allow a list rather than a string.
What is the desired outcome? Multiple ARNs for policy selection.

Examples

Branch used to test module update
Usage in Prod
Terraform Run

Confirmation

Terraform Run